https://github.com/taskflow/taskflow/pull/280
Author: David Seifert <soap@gentoo.org>
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,6 +29,9 @@ set(CMAKE_VERBOSE_MAKEFILE ON)
 # Include additional language check
 include(CheckLanguage)
 
+# Adhere to GNU conventions
+include(GNUInstallDirs)
+
 # Compiler vendors
 ## g++
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
@@ -244,6 +247,8 @@ message(STATUS "CMAKE_CURRENT_BINARY_DIR: " ${CMAKE_CURRENT_BINARY_DIR})
 message(STATUS "CMAKE_CURRENT_LIST_DIR: " ${CMAKE_CURRENT_LIST_DIR})
 message(STATUS "CMAKE_EXE_LINKER_FLAGS: " ${CMAKE_EXE_LINKER_FLAGS})
 message(STATUS "CMAKE_INSTALL_PREFIX: " ${CMAKE_INSTALL_PREFIX})
+message(STATUS "CMAKE_INSTALL_FULL_INCLUDEDIR: " ${CMAKE_INSTALL_FULL_INCLUDEDIR})
+message(STATUS "CMAKE_INSTALL_FULL_LIBDIR: " ${CMAKE_INSTALL_FULL_LIBDIR})
 message(STATUS "CMAKE_MODULE_PATH: " ${CMAKE_MODULE_PATH})
 message(STATUS "CMAKE_PREFIX_PATH: " ${CMAKE_PREFIX_PATH})
 message(STATUS "TF_BUILD_BENCHMARKS: " ${TF_BUILD_BENCHMARKS})
@@ -252,8 +257,6 @@ message(STATUS "TF_BUILD_SYCL: " ${TF_BUILD_SYCL})
 message(STATUS "TF_BUILD_TESTS: " ${TF_BUILD_TESTS})
 message(STATUS "TF_BUILD_EXAMPLES: " ${TF_BUILD_EXAMPLES})
 message(STATUS "TF_BUILD_PROFILER: " ${TF_BUILD_PROFILER})
-message(STATUS "TF_INC_INSTALL_DIR: " ${TF_INC_INSTALL_DIR})
-message(STATUS "TF_LIB_INSTALL_DIR: " ${TF_LIB_INSTALL_DIR})
 message(STATUS "TF_UTEST_DIR: " ${TF_UTEST_DIR})
 message(STATUS "TF_EXAMPLE_DIR: " ${TF_EXAMPLE_DIR})
 message(STATUS "TF_BENCHMARK_DIR: " ${TF_BENCHMARK_DIR})
@@ -334,7 +337,7 @@ endif(TF_BUILD_BENCHMARKS)
 # -----------------------------------------------------------------------------
 
 # install header
-install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/taskflow DESTINATION ${TF_INC_INSTALL_DIR})
+install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/taskflow DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
 # export target
 set_target_properties(${PROJECT_NAME} PROPERTIES EXPORT_NAME ${PROJECT_NAME})
@@ -350,7 +353,7 @@ install(TARGETS ${PROJECT_NAME} EXPORT ${PROJECT_NAME}Targets)
 install(
   EXPORT ${PROJECT_NAME}Targets 
   NAMESPACE ${PROJECT_NAME}:: 
-  DESTINATION ${TF_LIB_INSTALL_DIR}/cmake/${PROJECT_NAME}
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
 )
 
 # set up config
@@ -359,8 +362,8 @@ include(CMakePackageConfigHelpers)
 configure_package_config_file(
   ${PROJECT_NAME}Config.cmake.in
   ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
-  INSTALL_DESTINATION ${TF_LIB_INSTALL_DIR}/cmake/${PROJECT_NAME}
-  PATH_VARS TF_INC_INSTALL_DIR
+  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
+  PATH_VARS CMAKE_INSTALL_FULL_INCLUDEDIR
 )
 
 write_basic_package_version_file(
@@ -371,6 +374,6 @@ write_basic_package_version_file(
 install(
   FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
         ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
-  DESTINATION ${TF_LIB_INSTALL_DIR}/cmake/${PROJECT_NAME}
+	DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
 )
 
--- a/TaskflowConfig.cmake.in
+++ b/TaskflowConfig.cmake.in
@@ -1,6 +1,6 @@
 @PACKAGE_INIT@
 
-set_and_check(@PROJECT_NAME@_INCLUDE_DIR "@PACKAGE_TF_INC_INSTALL_DIR@")
+set_and_check(@PROJECT_NAME@_INCLUDE_DIR "@CMAKE_INSTALL_FULL_INCLUDEDIR@")
 
 include(CMakeFindDependencyMacro)
 find_dependency(Threads)